Stuck on "Flann, Lord of Ireland" (Assassin's Creed: Valhalla)

On the assignment "escort Kiara and Barid" - at first I did everything right, talked with Barid at the stables, reached the horses to the crossing, sat down, drove three of us (Euphor, Barid, Kiara), then I got distracted ... I found Kiara on the spot, and Barid was not there. I went looking for him - I found him at the stables in Dublin. And everything is stuck. He stands still there, you can't talk, you can't kill, you can push the horse from the spot, but he comes back and stands again. He tried different things, he burned down the stable, other houses are nearby, he runs, but comes back again. I rebooted - to no use, changed the location to England and back - to no use, did other tasks and took it again - to no use. While I was thinking what to do, I foolishly passed half the map, it's a pity to roll back. And I'm not sure that the save was saved until this jamb. I have not tried to reset the game yet.